Welcome to TechScreen

Welcome to the TechScreen site. This side shall support the exchange of knowledge in the domain of Web Engineering and related aspects. As a side effect, this side is used for research on knowledge management technologies. User can pose challenges in the problem domain and can participate in quizzes. Further a bibliography about arcticles in different related domains is continously extended. Finally, questionnaires on different issues are provided. To be able to participate you need an account and a password from TU Wien's TISS system.

IntelliJ not recognizing classes of other maven modules

I am developing an application with multiple java modules and when I try to use class of another module, that I have a dependency on java does not recognize it. It used to recognize it, but since I updated versions of the modules this does not work. I tried reimporting everything, but it doesn't work. I am working on IntelliJ
Submitted by Marija Mihajlova on Tue, 11/24/2020 - 18:53

docker-compose invalid type in volume

I am getting a following error when I run docker-compose up: *volumes contains an invalid type, it should be a string* my docker-compose file: data-emitter: build: context: DataEmitter dockerfile: ./Dockerfile volumes: - type: bind source: ./DataEmitter/data/logs.txt target: /data/logs.txt read_only: true Since there is a type: bind, what is the problem here?
Submitted by Djordje Bulatovic on Tue, 11/24/2020 - 18:51

Java throws NullPointerException - No stack trace

My java applcation is throwing a NullPointerException on some data. The applications is multithreaded application that takes data as input, processes it and sends it. On some of the data I get a NullPointerException , but no stack trace. After investigating them I did not see a difference between the data that causes NullPointerException and the data that doesn't. The only difference I get is that when the NullPointerException occurs the application has a high load.
Submitted by Marija Mihajlova on Tue, 11/24/2020 - 18:35

Dual Boot not working after Windows 10 update

After the latest Windows 10 update, GRUB will not let me pick an operative system. Instead, Windows 10 start immediately without asking me to pick an operative system, in my case Ubuntu or Windows. I noticed that my partitions are still there, so the Ubuntu is still there on my machine. How to resolve this issue?
Submitted by Djordje Bulatovic on Tue, 11/24/2020 - 18:32

Using Maven and Gradle through proxy

Because of my working environment, I have to set up Gradle and Maven to use a proxy server without password authentication. Only setting up the operating system to use a proxy is not sufficient, as I cannot establish network communication using Maven or Gradle. How can I configure the tools to communicate through a proxy?
Submitted by Josef Wechselauer on Tue, 11/24/2020 - 18:15

Making the TISS - calendar useful

I would like to incorporate the calendar provided by the Information Systems and Services (TISS) in my private calendar. However, many lectures which are not relevant for me are included in the online calendar, making it unusable for me. Furthermore, a guide on how to import the calendar in my private calendar (e.g. Google calendars) would be helpful.
Submitted by Josef Wechselauer on Tue, 11/24/2020 - 15:01

Choosing an appropriate Web App Development Framework

The selection of a fitting framework for developing web applications can be critical for the success of web projects. However, this selection process is not always trivial and depends on different criteria, such as expected time-to-market, functional and non-functional requirements, experience and size of the developer team, etc. Guidance for selecting a fitting framework would be helpful.
Submitted by Josef Wechselauer on Tue, 11/24/2020 - 13:59

Set up a development environment for Kotlin/React

I wish to develop web applications in Kotlin, since the type safety and the advanced features make the development experience a lot more pleasant. Kotlin can be compiled to Javascript and ran in the browser, but the current guide on how to do this is slightly outdated.
Submitted by Alem Zupa on Sat, 11/21/2020 - 19:39

English Knowledge Quiz

Submitted by Nikola Gospavic on Sun, 09/06/2020 - 11:29

"Relevance" Button in TechScreen doesn't seem to work

No matter how many stars I select for "Relevance", it always says "You voted 1". Besides that, I don't understand how a level of expertise could measure a question's relevance for web engineering...
Submitted by Christian Obkircher on Mon, 12/02/2019 - 20:58

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